package base;

/**
 *  Copyright (c) 1999-2011, Ecole des Mines de Nantes
 *  All rights reserved.
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions are met:
 *
 *      * Redistributions of source code must retain the above copyright
 *        notice, this list of conditions and the following disclaimer.
 *      * Redistributions in binary form must reproduce the above copyright
 *        notice, this list of conditions and the following disclaimer in the
 *        documentation and/or other materials provided with the distribution.
 *      * Neither the name of the Ecole des Mines de Nantes nor the
 *        names of its contributors may be used to endorse or promote products
 *        derived from this software without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND ANY
 *  EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 *  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS AND CONTRIBUTORS BE LIABLE FOR ANY
 *  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 *  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 *  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 *  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/**
 * Created by IntelliJ IDEA. User: njussien Date: 30/11/12 Time: 10:46
 */
public class Fonction extends Terme {

	private String nom;
	private int arite;
	private Terme[] operandes;

	public Fonction(String nom, Terme... operandes) {
		this.nom = nom;
		arite = operandes.length;
		this.operandes = operandes;
	}

	@Override
	public boolean contains(Variable var) {
		for (int i = 0; i < arite; i++) {
			if (operandes[i].contains(var)) {
				return true;
			}
		}

		return false;
	}

	@Override
	public void substituer(Variable var, Terme terme) {
		for (int i = 0; i < arite; i++) {
			if (operandes[i] instanceof Variable && operandes[i].getName().equals(var.getName())) {
				operandes[i] = terme;
			} else if (operandes[i] instanceof Fonction) {
				operandes[i].substituer(var, terme);
			}
		}

	}

	@Override
	public String getName() {
		return nom;
	}

	public Terme[] getOperandes() {
		return operandes;
	}

	public void setOperandes(Terme[] operandes) {
		this.operandes = operandes;
	}

	public String toString() {
		String ret = nom + "(";
		for (int i = 0; i < operandes.length - 1; i++)
			ret += operandes[i].toString() + ",";

		if (arite != 0) {
			ret += operandes[arite - 1];
		}

		ret += ")";
		return ret;
	}

	public boolean equals(Object o) {
		if (o instanceof Fonction) {
			Fonction a = (Fonction) o;
			if (a.getName().equals(nom) && a.operandes.length == operandes.length) {
				for (int i = 0; i < operandes.length; i++) {
					if (!operandes[i].equals(a.operandes[i])) {
						return false;
					}
				}

			} else
				return false;
		} else
			return false;

		return true;

	}

	public Fonction copy() {
		Terme[] operandesCopy = new Terme[operandes.length];
		for (int i = 0; i < operandes.length; i++)
			operandesCopy[i] = operandes[i].copy();

		return new Fonction(nom, operandesCopy);

	}

}
